help no ac vacum problem
Thread Starter
Instructor
Joined: Nov 2004
Posts: 213
Likes: 1
From: baton rouge la
help no ac vacum problem
1998 convertible no ac,my dealer wont work on it,because its over 10 years old,brought it to a goodyear place,they worked on it atleast 6 hours,,they gave up and told me to bring it to a dealer ,that it has a vacum problem,,,helpppppp what can i check or do to find the trouble????thanks guys,,,,tony
Thread Starter
Instructor
Joined: Nov 2004
Posts: 213
Likes: 1
From: baton rouge la
info
the ac was checked for refrigiant and i wasted my money with a new climate controll mod,i replaced,it blows hot air and out all the vents all the time,,,i did notice some batter corrosion awile back and put a new battery and hosed the corrosion area,to clean it away,,i just bought the car and inherited this trouble,
Le Mans Master
Joined: Dec 2003
Posts: 5,622
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From: Savannah Georgia
Cruise-In VIII Veteran
You said you just bought the car right? Do you know in the intake has been taken off the car? It sounds to me like the vacuum line on the back of the intake has come off or not reinstalled if intake was off. Maybe the previous had an intake swap or oil press sending unit problem.
Thread Starter
Instructor
Joined: Nov 2004
Posts: 213
Likes: 1
From: baton rouge la
yes
i just picked it up,the mech said he found some part of the vacum line bad,he fixed that,but he said he doesnt have vacum from the engine to the check valve,and he cant reach behind the engine to find it,,????????what can i check?also the oil pressure gauge is pegged when i bought it ..and still is
Le Mans Master
Joined: Dec 2003
Posts: 5,622
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From: Savannah Georgia
Cruise-In VIII Veteran
i just picked it up,the mech said he found some part of the vacum line bad,he fixed that,but he said he doesnt have vacum from the engine to the check valve,and he cant reach behind the engine to find it,,????????what can i check?also the oil pressure gauge is pegged when i bought it ..and still is
Le Mans Master
Joined: Dec 2003
Posts: 5,622
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From: Savannah Georgia
Cruise-In VIII Veteran
this is a LS1 how to on head and cam swap, but it shows you how to pull the intake
http://www.ls1howto.com/index.php?article=1
http://www.ls1howto.com/index.php?article=1
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Le Mans Master
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From: Savannah Georgia
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From: West Norriton PA
St. Jude Donor '08
The long black cannister by the door.
Pro
Joined: Jul 2004
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From: Media Pennsylvania
Remove the RH front tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
Remove the RH front wheelhouse filler panel. Refer to Wheelhouse Filler Replacement in Body Front End.
Remove the PCM. Refer to Powertrain Control Module Replacement in Engine Controls.
Tape off the rear edge of the RH fender and the front edge of the RH door to prevent scuffing.
Open the RH door.
Utilizing the opening between the fender and the door, remove the screws retaining the vacuum tank (1) to the hinge pillar (3).
Working through the wheelhouse opening, disconnect the I/P harness vacuum connector (4) from the vacuum check valve (2).
Disconnect the engine harness vacuum connector (5) from the vacuum check valve (2).
Remove the vacuum tank (1) from the vehicle.
Disconnect the vacuum check valve (2) from the vacuum tank (1).
Last edited by backnblack2003z06; May 31, 2008 at 09:13 PM.
Race Director
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From: West Norriton PA
St. Jude Donor '08
Thread Starter
Instructor
Joined: Nov 2004
Posts: 213
Likes: 1
From: baton rouge la
ok
i took out the battery and battery holder,i can see and hold in my hand two vacum lines ,just the ends comming from the vacum check valve,,,now where do they go,,,i dont see any other sides laying around any where////////i guess one goes to the engine ,but where does the other go?
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
One line should go into the wiring harness, up the back of the engine to the manifold. The other is probably the one that goes through the firewall to the HVAC controller. The one going to the manifold is a pain to replace/repair because it is buried in the harness, much easier to just run a new line. I bet your battery leaked acid and ate the two lines up. You definitely need to neutralize the acid and repaint your frame damage if any. Also check your PCM and connectors for any acid damage and repair that too. Here's a good link with before and after pics of acid damage. Good luck!
http://forums.corvetteforum.com/show....php?t=2031816
edit: Check out the last pic in post #8 of this thread to show you which lines go where from the vac cannister.
http://forums.corvetteforum.com/show....php?t=1966898
http://forums.corvetteforum.com/show....php?t=2031816
edit: Check out the last pic in post #8 of this thread to show you which lines go where from the vac cannister.
http://forums.corvetteforum.com/show....php?t=1966898
Last edited by c5streak; Jun 1, 2008 at 09:49 AM.
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
I may be wrong here but, I think the line goes thru the firewall next to the wire harness that goes thru the firewall also, under the batt tray. I don't think it's actually in the harness. Someone flog me if I'm wrong!